Vat dyestuff containing sulphur and process of making same



' Patented m 12, 1925.

jUN -r p STATES PATs-NfrToFFmE;

EBWIN HOFFL AND HANS HEYNA, OF H OCHST-ON-THE-MAIN, GERMANY, ASSIGNORSTO EABBWERKE VORM. MEISTERLUCIUS & BRUNING, OF HOGH-S'. l'-ON-TEE-MAIN,GERMANY, A. CORPORATION OF GER-MANY. 4;

' VAT mrnsrurr con'ramrne sunrnun AND rnoonss or MAKING SAME.

Homewing.

"To all whom it may concern:

Be it known that we, ERWIN HOI-FA and HANS HEY'NA, citizens of Germany,residing at Hochst-on-the-Main, Germany, have 6 invented certain new anduseful Improvements in Vat Dyestuffs Containing Sulphur and Processes ofMaking Same',-of which the following is a specification.-

In .11 S. patent-application Ser. No.

691,481 filed February 8, 1924, Example 8,

- it is stated that the product obtained by condensingB'z-l-chloro-6L7-benzo-oxythionaphthene s We 4 ,2 1

Application filedAugust 14, 1a24. Serial No. 732,117.

After having heated the miiture for a short time, the dyestufiseparates. It dyes in the vat cotton a blue tint with ared hue.

(3) To a solution of dibronio-alpha-isatinchloride, the position of thebromine atoms'bemg probably in the 5.7 position, prepared from 6Opartsof dibromisatin, 42

parts of-phosphorous pentachloride in 500 parts of benzene, are added 46parts-of Bz-I- chloro6.7-benzoeoxythionaphthene suspended in 40 partsof'ben'zene. After'having heated the mixture for a short time, the dyestuff separates. It dyes cotton a grey tint with a violet hue. I

(4) To a solution of beta-naphthisatinchloride, prepared from parts ofbeta- "naphthisatin and 22 parts of-phosphorous pentachloride in 100parts of benzene, are added 24 parts of Bz-1-chlor0-6.'7-benzoo'xythionapht-hene suspended in 24 parts of benzene. Thedyestuff, which separates after the mixture has been heated for a short(1) To a solution of alpha isatinchloride,

" prepared from 30 parts of isatin, 42 parts of phosphorouspentachloride and 100 arts of benzene, are added 46 parts ofz-lchloro-6.7-beuz0-oxythionaphthene in v 100 parts of benzene. Afterhaving heated the 40 solution for a short time, it becomes violet andthe d estutf separates in the fornrof crystals. t dyes in the vat cottona dark bluish-grey tint. j

(2) To a solution of 5-,hromo -alphadsatinchloride, prepared from 23parts of 5 'bromisatim: 22 parts of phosphorous pentachloride and 100parts of benzene, are added 24- parts ofBz-1-chloro-6.7-benzo-oxythionaphthene suspended in 24 parts of benzene.

Now we time, dyes cotton a dull green tint.

'Having now described our invention, what we claim is:

l. The process of preparing vat-dyestuffs containing sulphur, whichconsists .in condensing B7. 1 halogen 6.7 benzo oxythio naphthencs withreactive alpha-substitution products ofisa tins. e 3

2. As new substances, the dyestuffs of the general formula:

..wherein X signifies halogen, Y a benzene-or naphthalene nucleus, andwherein the isatin and the benzooxythionaphthene residues may besubstituted inany manner, which dye tufl 'sar'eoip a dry state,brownish-violet powders and dissolve-in concentrated sulph'uric acidwith a characteristic coloration.

3. A new product, the dyestutf of the folconcentrated sulphnric acidwith a blue 1 lowing formnla: color, dyeing cotton from a. golden-yellowing and chlorine. 5 Intestimony whereof we aflixour signas I NH tures'ERWIN HorFA 4 o. t c=c Q HANS HEYNA. co Attest: v

c. 0. L B. Wms, being a brownish-violet powder, soluble in EDITH Bmpmzn.

wit a blue tint of good fastncss to wash- I

